What is @datadog/pprof?
The @datadog/pprof package is a Node.js module provided by Datadog for profiling Node.js applications. It allows developers to generate and analyze CPU and heap profiles to understand the performance characteristics of their applications and identify bottlenecks or memory leaks.
What are @datadog/pprof's main functionalities?
CPU Profiling
This feature enables CPU profiling, allowing developers to understand where their application spends most of its execution time. The code sample demonstrates how to start CPU profiling with a specified duration and sampling rate.
const profiler = require('@datadog/pprof');
profiler.start({
service: 'my-service',
// 10 minutes profiling duration
duration: 600,
// Profile CPU every 1000 milliseconds
sampleRate: 1000
});
Heap Profiling
Heap profiling helps in identifying memory leaks and understanding memory allocation patterns. The code sample shows how to start heap profiling with a specified interval between snapshots.
const profiler = require('@datadog/pprof');
profiler.heap.start({
service: 'my-service',
// Take a snapshot every 600 seconds
snapshotInterval: 600
});
Other packages similar to @datadog/pprof
v8-profiler-next
v8-profiler-next is a Node.js package for profiling the V8 JavaScript engine. It provides similar functionalities for CPU and heap profiling. Compared to @datadog/pprof, it focuses more on the V8 engine specifically and might offer more detailed insights for applications heavily relying on V8's features.
node-memwatch
node-memwatch is another Node.js package designed for memory leak detection and heap diffing. While it provides valuable insights into memory usage and leaks, it does not offer CPU profiling, making it less comprehensive than @datadog/pprof for overall performance analysis.